/* Copyright (C) 2001-2006 Artifex Software, Inc.
   All Rights Reserved.
  
   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: smtf.h 8022 2007-06-05 22:23:38Z giles $ */
/* Definitions for MoveToFront filters */
/* Requires scommon.h; strimpl.h if any templates are referenced */

#ifndef smtf_INCLUDED
#  define smtf_INCLUDED

/* MoveToFrontEncode/Decode */
typedef struct stream_MTF_state_s {
    stream_state_common;
    /* The following change dynamically. */
    union _p {
	ulong l[256 / sizeof(long)];
	byte b[256];
    } prev;
} stream_MTF_state;
typedef stream_MTF_state stream_MTFE_state;
typedef stream_MTF_state stream_MTFD_state;

#define private_st_MTF_state()	/* in sbwbs.c */\
  gs_private_st_simple(st_MTF_state, stream_MTF_state,\
    "MoveToFrontEncode/Decode state")
extern const stream_template s_MTFE_template;
extern const stream_template s_MTFD_template;

#endif /* smtf_INCLUDED */
